[Me...] Posted August 15, 2019 Share Posted August 15, 2019 hello, i need help with creating a distance between a plane and top of cylinder dimension. I am getting weird results. any input how i would i approach this is appreciated.Capture.PNGthumbnail_Capture.png Link to comment Share on other sites More sharing options...
[Ow...] Posted August 15, 2019 Share Posted August 15, 2019 Couple different ways but probably the simplest would be, measure the flat as a plane, measure the diameter. Go to Size, more and select result element. Right click in the formula box and choose the Actual feature attributes as defined below to create the formula: getActual("Circle1").radiusD2- getActual("Plane1").x Link to comment Share on other sites More sharing options...
[Ow...] Posted August 15, 2019 Share Posted August 15, 2019 Your plane would be Y (not X) Link to comment Share on other sites More sharing options...
[Me...] Posted August 15, 2019 Author Share Posted August 15, 2019 Please sign in to view this quote. thank you owen, that worked out perfect! Link to comment Share on other sites More sharing options...
[Ow...] Posted August 15, 2019 Share Posted August 15, 2019 Glad to help. If you're scanning, with that tight of tolerance on the 3.5 Ø, be sure to use the correct UPR spline filter of 15upr. Recommend filter to use per size: Metric < 8mm =15upr 8- 25mm =50upr 26 - 80mm =150upr 81 - 250mm =500upr >250mm = 5000upr Inch <0.3150 = 15upr 0.315 – 1.02362 =50upr 1.0236 – 3.1496 = 150upr 3.189 – 9.8425 = 500upr > 9.8425 = 5000upr Link to comment Share on other sites More sharing options...
[Ja...] Posted August 16, 2019 Share Posted August 16, 2019 Please sign in to view this quote. Owen, where did you get this information regarding filtering settings? Cookbook? Link to comment Share on other sites More sharing options...
[Cl...] Posted August 16, 2019 Share Posted August 16, 2019 Please sign in to view this quote. Shouldn't it be "Gauss" for a diameter, or any closed non linear feature? Link to comment Share on other sites More sharing options...
[Ow...] Posted August 16, 2019 Share Posted August 16, 2019 Jacob, Yes, some kind of book. It also says to use a Gauss filter (not spline) and to include prefilter and 5 adjacent points. As always, there are a lot of variables that should be taken into consideration (material, probe size, length, balance,probe head type, etc.) and there are a lot of disclaimers (in Da'book) recommending each and every check be validated. That's why they're called good "default" strategies. Da'book also says to use Vast Navigator's "optimal" speeds instead of recommendations if it's available on your system, however, I've found instances where Navigator speed recommendations weren't optimal at all. Link to comment Share on other sites More sharing options...
[Ja...] Posted August 16, 2019 Share Posted August 16, 2019 Awesome, thanks Owen. Quick Question: When I check the speed of my scan per feature, it just gives me a number no units. Is that given in system units per second? Link to comment Share on other sites More sharing options...
[Ro...] Posted August 16, 2019 Share Posted August 16, 2019 Please sign in to view this quote. If you're in inch its inches per second, if you're in metric its MM per second. Link to comment Share on other sites More sharing options...
[Br...] Posted August 16, 2019 Share Posted August 16, 2019 Please sign in to view this quote. The Cookbook says Gauss, but If you talk to anyone at Zeiss, they will tell you Spline is better. The Gauss filter has some issues with distortion at the boundaries or ends of the dataset. Spline is supposed to eliminate this problem. Not sure why the Cookbook still says to use Gauss. Link to comment Share on other sites More sharing options...
[SH...] Posted August 17, 2019 Share Posted August 17, 2019 Please sign in to view this quote. If you don't mind ,can you disclose more about formula options. I am working with calypso 2018,I don't have PCM option. Special training required for formula programming??. Link to comment Share on other sites More sharing options...
[Da...] Posted August 17, 2019 Share Posted August 17, 2019 Please sign in to view this quote. For such things you don't need a PCM, search forum for "result element" Link to comment Share on other sites More sharing options...
[Ri...] Posted August 19, 2019 Share Posted August 19, 2019 If you have Calypso 2017 and newer, just use the Caliper tool. It would be in the Y axis. Link to comment Share on other sites More sharing options...
[Ow...] Posted August 20, 2019 Share Posted August 20, 2019 "" If you have Calypso 2017 and newer, just use the Caliper tool. It would be in the Y axis"". Yeah good point , thanks for pointing that out Richard. Needless to say, I haven't tried the caliper characteristic yet. Link to comment Share on other sites More sharing options...
[Ri...] Posted August 20, 2019 Share Posted August 20, 2019 Please sign in to view this quote. It's the "bee's knees" or whatever saying the cool kids are saying these days. Link to comment Share on other sites More sharing options...
[Me...] Posted August 22, 2019 Author Share Posted August 22, 2019 Please sign in to view this quote. So after measuring the part on the cmm I saw that actual diameter on the cmm does not match what Im measuring with my mic. Any idea what i can do to fix this inconsistency? I am getting .124 (3.149mm)Inkedthumbnail_Capture_LI.jpg Link to comment Share on other sites More sharing options...
[Ow...] Posted August 22, 2019 Share Posted August 22, 2019 Are you using the correct filter and speed? Use a 15 UPR and speed shouldn't be more than 0.118 and make sure you're recording at least 105 points. To test to see if it's the speed or filter causing the size difference , measure the dia with 4 to 6 single points and if the size is correct, it's the speed or filter causing the issue. Also, look at the roundness plot and see what it looks like, if it's garbled or missing sections, it's the filter or outliers removing too much data. Link to comment Share on other sites More sharing options...
[Me...] Posted August 22, 2019 Author Share Posted August 22, 2019 Another method would be to measure the plane, measure the diameter as a curve, create a maximum coordinate construction for the curve, and report the distance between the 2. Robert Link to comment Share on other sites More sharing options...
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